On 2/01/2015 2:06 AM, songbird wrote:
David Hare-Scott wrote:
...
So the upshot of it is there are risks to living and you should not imagine
that those risks are eliminated in town water or necessarily greater in roof
water.

there are decent (low tech even) systems which reject
the first amount of runoff from a rooftop collection
system which avoids most of the "gunk".

We drink the rainwater we collect from our various roof surfaces as do
all of our rural neighbours. There is no way known that we would ever
install those 'first flush' diverters. It wastes too much water from
what might be a brief passing rain event.